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1.4" Silurian Crinoid Calyx (Marsupiocrinus) - Tennessee
This is the calyx of a Silurian Marsupiocrinus crinoid from the Brownsport Formation of Decatur County, Tennessee. The calyx is the "head" of the crinoid, where the arms and stem attaches. Often, the calyx is the only part of a crinoid that preserves.
Crinoids, sometimes commonly referred to as sea lilies, are animals, not plants. They are echinoderms related to starfish, sea urchins, and brittle stars. Many crinoid traits are like other members of their phylum; such traits include tube feet, radial symmetry, a water vascular system, and appendages in multiples of five (pentameral). They first appeared in the Ordovician (488 million years ago) and some species are still alive today.
SPECIES
Marsupiocrinus sp.
AGE
LOCATION
Decatur County, Tennessee
FORMATION
Brownsport Formation
SIZE
1.4" wide
CATEGORY
SUB CATEGORY
ITEM
#189498
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